{
  "manageEntity": {
    "action": "Save",
    "entityId": "368554",
    "entityType": "Track",
    "nonce": "0x0ab6e37d5921fc062cc842e993cef44f1cfdaac8d2ef06adbf887b1f918a1bc0",
    "signature": "0x922c2e87d0d1593b21163ea1755c3b643cacb6e78c545fc19dec13a99f58183c6fc3c14a31ce9d3f246e5b9ee192c55436ab231e21bbdb455c8d040b1ea856a51c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}